@misc{cogprints848, volume = {10}, number = {024}, title = {Why Grandmothers May Need Large Brains. (Commentary on Skoyles on Brain Expertise)}, author = {Nicholas Humphrey}, year = {1999}, pages = {1--3}, journal = {Psycoloquy}, keywords = {brain size, evolution of intelligence, human life history, social intelligence hypothesis, human evolution}, url = {http://cogprints.org/848/}, abstract = {Skoyles's case against human brain size being related to IQ is strong; but his case in favor of its being related to expertise is weak. I propose that the explanation for the evolutionary expansion of the human brain in fact lies far away, in the need to have a brain that could continue to function into old age.} }